/**

* Copyright (c) 2025, WSO2 LLC. (https://www.wso2.com).

*

* WSO2 LLC. licenses this file to you under the Apache License,

* Version 2.0 (the "License"); you may not use this file except

* in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing,

* software distributed under the License is distributed on an

* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

* KIND, either express or implied. See the License for the

* specific language governing permissions and limitations

* under the License.

*/

/**

* Aggregates all CHANGELOG.md files in the Nx workspace into a root CHANGELOG.md.

* Skips node_modules and the root CHANGELOG.md itself.

*/

const fs = require('fs');

const path = require('path');

const rootDir = process.cwd();

const outputFile = path.join(rootDir, 'CHANGELOG.md');

// List of package or directory names to skip when aggregating changelogs

const SKIP_PACKAGES = ['__legacy__', 'node_modules', 'dist', 'build', 'coverage', 'scripts', 'docs'];

const findChangelogs = dir => {

let changelogs = [];

const entries = fs.readdirSync(dir, {withFileTypes: true});

for (const entry of entries) {

const fullPath = path.join(dir, entry.name);

if (entry.isDirectory() && !SKIP_PACKAGES.includes(entry.name)) {

changelogs = changelogs.concat(findChangelogs(fullPath));

} else if (entry.isFile() && entry.name === 'CHANGELOG.md' && fullPath !== outputFile) {

// Check if the changelog is inside a skipped package

const relPath = path.relative(rootDir, fullPath);

const parts = relPath.split(path.sep);

if (!parts.some(part => SKIP_PACKAGES.includes(part))) {

changelogs.push(fullPath);

}

}

}

return changelogs;

};

const aggregate = () => {

const changelogFiles = findChangelogs(rootDir);

let toc = '<!-- THIS FILE IS AUTOGENERATED. DO NOT EDIT DIRECTLY. -->\n\n';

toc += '# Aggregated CHANGELOG\n\n';

toc += '## Table of Contents\n\n';

changelogFiles.forEach(file => {

const relPath = path.relative(rootDir, file);

// Get the package name (directory containing the CHANGELOG.md)

const pkgName = path.basename(path.dirname(file));

// Anchor links: replace / and . with - for markdown anchor compatibility

const anchor = relPath.replace(/\//g, '').replace(/\./g, '').toLowerCase();

toc += `- [${pkgName}](#${anchor})\n`;

});

toc += '\n';

let output = '';

changelogFiles.forEach(file => {

const relPath = path.relative(rootDir, file);

// Anchor for markdown: '## ' + relPath

output += fs.readFileSync(file, 'utf-8') + '\n\n';

});

fs.writeFileSync(outputFile, toc + output);

console.log(`Aggregated ${changelogFiles.length} changelogs into ${outputFile}`);

};

aggregate();